摘要:
An embodiment of a method for manufacturing a cable component includes providing at least a pair of shaped wire members, passing the wire members through at least one shaped roller set, providing at least one cable portion, placing the wire members over the cable portion and running the wire members and cable portion through an assembly roller to form a subassembly, and attaching a fixing element to the subassembly to secure the wire members and cable portion to complete the cable component.
摘要:
An apparatus and method to enhance the efficiency of an energy harvesting device is disclosed. A modulator module creates fluctuations in the flow at a predetermined frequency or group of frequencies and these fluctuations increase mechanical vibrations which are then harvested by an energy harvesting module.
摘要:
A method for making directional resistivity measurements and forming a directional resistivity image of a subterranean formation includes processing a plurality of directional resistivity measurements and corresponding azimuth angles to calculate a first order harmonic representation at selected azimuth angles. A two dimensional borehole image may be formed by repeating the procedure at multiple measured depths in the borehole.
摘要:
A fiber optic distributed vibration system for detecting seismic signals in an earth formation is provided. The system includes a fiber optic cable deployed in a borehole that extends into the earth formation and which is configured to react along its length to a seismic wave incident on the fiber optic cable from outside the borehole. An optical source launches an optical signal into the fiber optic cable while the seismic wave is incident thereon. A receiver detects coherent Rayleigh noise (CRN) produced in response to the optical signal. A processing circuit processes the detected CRN signal to determine characteristics of the earth formation.
摘要:
A downhole measurement tool includes at least one non-planar antenna configured for transmitting and/or receiving electromagnetic radiation. The non-planar antenna includes at least one non-planar loop of antenna wire deployed about a tool body. In one exemplary embodiment, the non-planar antenna may be thought of as being bi-planar in that it includes first and second sections defining first and second intercepting geometric planes. In another exemplary embodiment, the axial separation between the non-planar loop of antenna wire and a circular centerline of the antenna varies substantially sinusoidally with respect to an azimuth angle about the circumference of the tool. Exemplary non-planar antennae in accordance with the invention may be advantageously configured to transceive substantially pure x-, y-, and z-mode radiation.
摘要:
A changepoint detector for modeling data received from at least one sensor in a process in the hydrocarbon industry. The data is segmented into a plurality of segments and for each segment a model is assigned and the data corresponding to the segment fit to that model. A plurality of segmentations are thus provided and these segmentations ar evaluated and assigned weights indicative of the fit of the models of the segmentation t the underlying data. The segmentation models are further used to calculate a result that may be input to a process control program.